Compound engine.



Patented Ian. 23, I900.

u. c. CLAY. COMPOUND ENGINE.

(Application filed May 11. 1899.)

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Nu. 64l,-762. I Patented Jan. 23, I900.

-H. C. CLAY.

COMPOUND ENGINE.

(Application filed May 11. 1899.)

(No Model.) 5 Sheets$heet 2.

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No. 64l,762. Patented Jan. 23, I900. H. C. CLAY.

COMPOUND ENGINE.

(Application filed May L1. 1899.)

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No. 64!,762. Patented Jan. 23, I900.

- H. c. CLAY.

COMPOUND ENGINE.

(Application filed May 11. 1899.)

(No Model.) 5 ShaetsSheet 5.

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NITED STATES" PATENT FFICE.

HARRY C; CLAY, OF COLUMBUS, INDIANA, ASSIGNOR TO THE REEVES & COMPANY,OF SAME PLACE.

COMPOUNDENGINE.

SPECIFICATION forming part of Letters Patent No. 641,762, dated January23, 1900.

' A plication filed Ma, 11, 1899. Serial no. 716,357. on, model.)

To all whom it may concern.-

Be it known th'atl, HARRY 10, CLAY, a citi zen of theUnited States,residing at Columbus, in the county of Bartholomewand State of Indiana,have'invent'ed a new and useful Compound Engine, of which the followingis a specification.- I

My invention relates to an improvement in compound engines.

The objectof my'invention is to'provide means by which a compound enginemay be easily and quickly changed to asimple en inders, and vice versa.

A further object of my invention is to compactly arrange the shiftingmechanism for use in connection with portable engines, such astraction-engines, and to provide means by which the exhaust-steam may becaused to heat the feed-water.

The accompanying drawings illustrate my invention.

Figure 1 is a section on line 1 1 of Fig. 3. Fig. 2 is a section online2 2 of Fig. 3. Fig. 3 is a section on line 3 3 of Fig. 1- with the partsarranged for the engine to run compound. Fig. 4 is a similar sectionwith the parts arranged for the engine to runsimple. Fig. 5 is a plan ofthe receiver and heater. Fig. 6 is a section on line 6 60f Fig. 5. VFig. 7 is a section on line 7 7 of Fig. 5. Fig. 8 is ahorizontal sectionon line 8 8 of Fig. 6.

In the drawings, 10 indicates the smaller or high pressure cylinder, and11 indicates the larger or low-pressure cylinder. Cylin der 10 isprovided with the usual steam-chest 12 and cylinder 11 with steam-chest13, the usual valves (not shown) being mounted in each chest. Thelowpressure cylinder is formed with a steam-passage 14, between theupper end of which and the chest 12 extends a bridgepipe 15, to whichinitial-pressure steam is conducted. The lower end of passage 14 isthrottled to form a port 16, which lies in a face 17, formed at one endof the chest 13 of the low-pressure cylinder. Formed in face 17, beneathport 16, is a port 18,which leads to the low-pressure chest 13. Bothcylinders are bolted to'the upper face of a hollow base 19. formed onits lower face, so as to rest directly one end of an operating-arm 31.

In the drawings base 19 is.

22, and said base is provided with aface 17 which registers with andforms a continuation of the face 17 of chest 13. Receiver 21 dischargesthrough a port 23, formed in face 17, and beneath said port is anexhaust-port 24,

which leads from said face beneath receiver '21 to the heater 22.

Mounted in heater 22 is a coil of pipe 25, through which the feed-wateris passed. gine using initial-pressure steam in both cyl- As previouslystated, faces 17 and 17 form a continuous plane, and upon the facethusformed is secured a valve-plate 26, having ports 16, 18, 23, and 24,which extend through the valve-plate and register with the which ismounted a slide-valve 28, having a passage 29, adapted to connect ports18' and 23 or 23' and 24. Valve 28 is provided with a stem 30, to theouter end of which is secured Arm 31 is provided with'a pair of racks32, which extend down upon each side of a central boss 33. To the end ofboss 33 is pivoted a lever 34, the inner end of which is provided withsegmental gears 35, which mesh with racks 32. The outer end of lever 34is provided with a link 36, by which it may be operated. Boss 33 ishollow, and mounted therein is a thimble 37, which is forced intoengagement with valve 28 by a spring 38, thevalve being thereby held toits seat on plate 26.

Cylinder 1O exhausts directly into receiver 21 through passage 39 andcylinder 11 exhausts into the heater 22 through passage 40.

The operation is as follows: Suppose the engine to be run compound. Theouter end of lever 34 is thrown out, thus raising valve 28 to theposition shown in Fig. 3, the passage 29 forming communication betweenports 23 and 18', and consequently forming communication between thereceiver 21 and chest 13 of the low-pressure cylinder 11' and coveringexhaust-port 24. With the valve 28 in this To cause the be so contractedthat the initial-pressure steam passing therethrough to the low-pressurecylinder will bear such ratio to the amount of steam passing into thehigh-pressure cylinder that the power developed in the two cylinderswill be the same.

It will be readily understood that the valveplate 26 is not absolutelyessential, it being possible to mount valve 28 directly upon faces 17 17but the interposition of the valve-plate is advisable for convenience ofconstruction and accuracy of fitting.

I claim as my invention- 1. In a compound engine, the combination withthe high and low pressure cylinders, of a receiver, receiving theexhaust from the high-pressure cylinder, a feed-water heater receivingexhaust from the low-pressure cylinder, an auxiliary high-pressurepassage, and a valve arranged to be thrown so as to cut off the heaterfrom the receiver and allow communication between the receiver andlow-pressure cylinder, or to connect the receiver and heater and allowcommunication between the auxiliary passage and the lowpressurecylinder.

2. In a compound engine, the combination with the high and low pressurecylinders, of a receiver, receiving the exhaust from the high-pressurecylinder, a feed-water heater receiving exhaust from the low-pressurecylinder, a valve-chamber, a port leading from said chamber to theheater, a high-pressure passage leading into said chamber, and a valvemounted in said chamber, the said valve arranged to be thrown so as toout off the heater from the receiver and allow communication between thereceiver and low-pressure cylinder, or to connect the receiver andheater and allow communication between the highgressure passage and thelow-pressure cylin- 3. In a compound engine, the combination with thehigh and low pressure cylinders, of a receiver receiving the exhaustfrom the high-pressure cylinder, a port leading from said receiver, aport leading to the low-pressure cylinder, a high-pressure port, and anexhaust-port, a removable valve-plate having a series of portscorresponding to and registering with said ports, a val ve-chambermounted upon said plate and inclosing said ports, a slide-valve mountedin said chamber on the valve-plate,and means for throwingsaid valvewhereby the exhaust-port may be closed and communication formed betweenthe receiver and low pressure cylinder, or the receiver and exhaustconnected and communication formed between the high-pressure port andthe low-pressure cylinder.

4. In a compound engine, the combination with the high and low pressurecylinders, of a receiver receiving the exhaust from the high-pressurecylinder, a heater receiving the exhaust from the low-pressure cylinder,a port leading from said receiver, a port leading to the low-pressurecylinder, an exhaust-port leading into the heater, and a high-pressureport, a valve-plate having a series of ports corresponding to andregistering with said ports, a valve-chamber inclosing said ports, aslide-valve mounted in said chamber on the valve-plate, and means forthrowing said valve whereby the exhaust-port may be closed andcommunication formed between the receiver and the low-pressure cylinder,or the receiver and heater be connected through the exhaust andcommunication formed between the high-pressure port and the low-pressurecylinder.

5. In a compound engine, a casing extending between and arranged tosupport the high and low pressure cylinders, a receiving-chamber formedin said casing, a passage leading from the high-pressure exhaust intosaid receiving-chamber, a heating-chamber formed in said casing andhaving suitable feed-water conductors mounted therein, anexhaust-passage leading from the low-pressure cylinder into said heater,aport-face formed upon ad jacent portions of the low-pressure cylinderand said casing, a high-pressure port opening into said face, a portleading from said face to the low-pressure cylinder, a port leading intosaid face from the receiver, a port leading from said face to theheater, a valve, and means for throwing said valve whereby a connectionmay be established between the high-pressure port and low-pressurecylinder and between the receiver and heater, or communicationestablished between the receiver and low-pressure cylinder and theheater-port closed.

6. In a compound engine, a casing extending between and arranged tosupport the high and low pressure cylinders, a receiving-chamber formedin said casing, a passage leading from the high-pressure exhaust intosaid receiving-chamber, a heating-chamber formed in said casing andhaving suitable feed-water conductors mounted therein, anexhaust-passage leading from the low-pressure cylinder into said heater,a port-face formed upon adjacent portions of the low-pressure cylinderand said casing, a high-pressure port opening into said face, a portleading from said face to the low-pressure cylinder, a port leading intosaid face from the receiver, a port leading from said face to theheater, a removable valVe-plate provided with openings there ITO throughcorresponding to the ports before as to establish communication betweenthe mentioned, a slide-valve mounted upon said receiver and heater andbetween the highplate, a Valve-chamber inclosing said valve pressureport and low-pressure cylinder.

and said ports, and means for throwing said HARRY C. CLAY. 5 valve so asto close the port leading to the Witnesses:

heater and establish communication between ALLEN O. DENISON,

the receiver and low-pressure cylinder, or so B. M. HAMILTON.

